Automatic loom shuttle



Jan. 12, 1932. L. PAVlA 1,840,464

AUTOMATIC LOOM SHUTTLE Filed Aug. 9, 1930 1 3a, 10 ll 13a w ifs 15' 115b 13c 15 9 16 17 16 3 a, 1

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I!!! nnwmmumum mum: mum 33'?) 3a, 1'1 1 7 4 25 [m Patented Jan. 12, 1932PATENT OFFICE LUIGI PAVIA, OF ALLENTOVVN; PENNSYLVANIA AUTOMATIC LOOMSHUTTLE Application filed August 9,

This invention relates to shuttles for looms equipped withelectro-magnetic means to stop the same on substantial depletion ofweftin the shuttle and particularly to that class of such shuttles inwhich depletion of the weft is responsible for movement of acircuit-closer incorporated in the shuttle.

Given a shuttle of the class indicated having a spindle-includingelectro-conductive .10 system provided with a terminal, anotherelectro-conductive system arranged in the shuttle and having a terminaland a contact, a removable quill or other core for the weft windingsarranged on the spindle and having a lateral aperture, and a circuitcloser movable on the spindle within the core and projecting throughsaid aperture and normally urged to move into contact with said contactbut held from such movement by the Windings, my invention contemplatesproviding the shuttle (as the spindle thereof) and core with co-engagingmeans to determine registry of the core aperture with the circuitcloseron placing the core on the spindle and thereupon hold the core againstrotation on the spindle so as not to strain or incapacitate thecircuit-closer. My invention further contemplates avoiding weakening thebutt end of the core, and this I accomplish by terminating said apertureshort of said butt end of the quill, leaving said end annularly intact,and adapting the circuit closer to protrude through said end.

In the drawings,

Fig. 1 is a longitudinal horizontal section through a loom shuttle-box,showing the improved shuttle therein in plan;

Fig. 2 is a similar view of the box and shuttle;

Fig. 3 is a side elevation of the shuttle;

Fig. 41 a vertical longitudinal section thereof, with certain parts inside elevation;

Fig. 5 a similar view with some of said parts in section;

Fig. 6 is a butt-end view of the core.

1 is the shuttle body having some (metal) spindle-including structurehere comprising the following parts: The spindle 2, the clips 3 havinghooked ends 3a to engage the enlarged butt of the quill and hold thelatter 1930. Serial No. 434,139.

from endwise displacement on the spindle, the same receiving the butt ofthe spindle between them and being entered into mortises 1a in theshuttle body; the pin 4 on which the spindle butt is pivoted and thestop-pin 5 to limit downward pivotal movement of the spindle, both suchpins being mounted in the clips; and the spring 6 to hold the spindleelevated or depressed, being supported by pins 8 in the clips. Slippedonto the spindle is a core 9 for the windings, being here a wooden quillhaving a head 9a to be received by the hooks 3a when the spindle isdepressed. So much is the usual construction. The portion of the spindlewhich includes its but-t here also includes an enlargement 10, and thespindle has a longitudinal slit 11 which opens forwardly and rearwardlyexcept at its left-hand end where, within the enlar 'ement, it is openonly forwardly. In this slit is pivoted, at 12, a longitudinallyextending metal circuit-closer 13 in the form of a lever of the secondclass the left-hand end of which is backed by a spring 14 set in asocket in the enlargement and which normally tends to turn the lever inthe direction in which its left-and-right-hand ends would respectivelyprotrude from the slit at front and rear. The right-hand end of thelever is rearwardly rounded, as at 13a, and its left-hand'end has aforward projection 13?) whose extremity is permanently exterior of theenlargement and is bent up, as at 130. Opposite this bent-up end is thecontact 15 which is here a stud projecting inwardly from one of twometalplates 16 set in the front face of .the shuttle body and through a notch31) in the adjoining hook 3a (without contact therewith), the otherplate being connected with said hook by a wire 17.

- The spindle-including structure, wire and plate form one ofthementioned electro conductive systems and the other plate and contact15 form the other of said systems, the terminals (16) of which areadapted to be connected by the circuit-closer. i v

The quill has a slot aperture 18 to receive the, rearwardly protrudingportion of lever 13. when the quill is fully home on the spindle. W Ifthe quill is fully wound the windings a thereon hold the circuit closinglever in the position of Fig. 2, with said circuit open; but when themass of windings becomes appreciably depleted the spring 14 will shiftthe lever to close the circuit at 13c15.

At 19 is shown the shuttle box of a loom having the terminals 20 of apartial circuit 21 which contains a source of energy 22 and any wellknown means, shown diagrammatically at 23, for stoppingthe loom.

Each time the shuttle enters the box its plates 16 make contact with theterminals 20. So long as sufficient windings remain on the quill thecircuit then constituted by the indicated partial circuits in andextraneous of the shuttle remains open at 13al5;but if this circuit isthere closed because depletion of the windings has released thecircuit-closer the means 23 will be energized andstop the loom.

When the quill is placed on the spindle its aperture 18 is concealed bythe windings. In order that the weaver may determine that the apertureand circuit-closer register, and also to prevent his turning the quillafter the circuit-closer has sprung into the aperture (and possiblystraining the parts, as the circuit closer and quill and rendering theminoperative), I provide the spindle-including structure and quill withan interengaging projection 24: and recess 25. If the apertureregistered with the circuit-closer before the interlock was effected at2t2 5 there would be opportunity to turn the quill and in some wayinjure the parts, although when the quill was fully home the interlockwould prevent this; but as shown this is avoided by forming the apertureto extend sufficiently short of the butt end of the quill so that theinterlock occurs before the circuit-closer registers with and so isreleased bythe aperture.

Further, by extendingsaid aperture short of the butt end ofthe quillsaid end is left annularly intact and the quill is therefore notappreciably weakened. 7

Having thus fully described my invention what I claim is:

1. A shuttle of the class described having a spindle-includingelectro-conductive system provided with a terminal, anotherelectro-conductive system arranged in the shuttle and having a terminaland a contact, a removable core for the left windings arranged on thespindle and having a lateral aperture, and a circuit-closer movable onthe spindle within the core and projecting through said aperture andnormally urged to move into contact with said contact but held from suchmovement by the windings, said shuttle and core havin co-engaging meansto determine registry o the core aperture with the cirso that whenvthelatter is slipped on the spindle said means will interengage before saidcircuit-closer is cleared by the aperture.

2. In combination, a shuttle body, a core for the weft windings having alateral aperture, an electro-conductive system arranged in the body andhaving a terminal and a contact, and another electro coductive system1ncluding a metallic oore-retaining clip fixed in said body, a metallicpivoted spindle in contact with the clip, and a metallic circuit closermovable on the spindle within the core and normally urged to movethrough said aperture into contact with said contact but held therefromby the windings, and a second terminal electrically connected to theclip.

3. In combination, a shuttle body, a core for the weft windings having alateral aperture, an electro-conductive system arranged in the body andhaving a terminal exterior of the body and a contact within the body,and another electro-conductive system including a metalliccore-retaining clip fixed in said body and penetrated by the firstsystem without contact therewith, a metallic pivoted spindle in contactwith the clip, and a metallic circuit closer movable on the spindlewithin the core and normally urged to move through said aperture intocontact with said contact but held therefrom by the windings, and asecond terminal electrically connected to the clip.

In testimony whereof I afiix my signature.

. LUIGI PAVIA.

cuit-closer on placing the core on the spindle and thereupon hold thecore against rotation on the spindle and said aperture extendingsufficiently short of the butt end of the quill

